I am glad Souji and Nanao could end up together in the end. I felt so sad while reading their backstory. All Nanao suffered was due to his gender as an omega and Souji suffered because he was born to an omega. I get that his intent was well and he didn't want to hurt Nanao, but the fact that Nanao was pushed into the life of prostitution is kinda his fault. I wish at least Nanao's parents were decent and cared for him, but I guess they couldn't have met again if Nanao was living a good life.
Midarana Omega wa Koi wo Shinai